Webbrowserpassview

Overview

Executive Summary

Infection Vector and Technical Capabilities

• Direct Database Parsing: The tool does not rely on keylogging or memory scraping. Instead, it directly locates the specific SQLite databases and encrypted credential files used by each supported browser (e.g., Chrome's `Login Data` file).
• On-the-Fly Decryption: It utilizes the current logged-in user's context (specifically the Windows Data Protection API - DPAPI) to automatically decrypt the stored passwords instantly, displaying them in plaintext.
• Command Line Automation: Attackers utilize the tool's built-in command-line arguments (e.g., `/shtml`, `/stext`) to execute it silently in the background, instantly dumping all harvested credentials into a hidden text file for exfiltration, entirely bypassing the graphical interface.

Threat Assessment

Incident Response and Remediation

• Contextual Verification: First, determine if the tool was executed legitimately by an IT administrator assisting a user with password recovery (though this practice is strongly discouraged in enterprise environments).
• Assume Total Credential Compromise: If the execution was unauthorized, you must assume *all* passwords stored in the user's web browsers have been compromised.
• Mandatory Credential Reset: Initiate an immediate, mandatory reset of all enterprise passwords associated with that user. Advise the user to reset all personal passwords (banking, social media) that may have been stored in their corporate browser profile.
• Investigate the Source: Determine how the tool was delivered to the endpoint (e.g., look for an associated dropper trojan or signs of a compromised RDP session).

Known aliases

Threat reports may refer to this family under multiple names:

• HackTool.WebBrowserPassView
• Riskware.PasswordRevealer
• Win32/WebBrowserPassView

MITRE ATT&CK Techniques

Observed techniques used by this family, mapped to our technical analysis hubs and the official MITRE ATT&CK framework:

Tactical Mitigations

Based on the techniques used by this family, consider the following defensive strategies:

• T1003: Monitor for LSASS memory dumping or registry SAM extraction. Enable Credential Guard on Windows systems.
• T1059: Restrict execution of scripting languages such as PowerShell, VBScript, or Python to authorized administrators. Enforce Script Block Logging.

MITRE D3FEND™ Defensive Countermeasures

Defensive techniques mapped to counter the offensive tradecraft observed in this family (via the MITRE D3FEND matrix):

Tiered Detection Rules (Cisco CAIRN Model)

Modern threat detection requires multi-layered rule engineering. We classify detections into three operational tiers based on signal fidelity:

rule MALWARE_WIN_WEBBROWSERPASSVIEW_T1_ARTIFACT {
    meta:
        description = "Tier 1 Primitive Artifact: Raw string matches for Webbrowserpassview"
        tier = "T1 - Primitive Artifact"
        confidence = "Low-Medium (Fast Triage)"
        author = "SystemHelpdesk Threat Research Desk"
        date = "2026-10-14"
    strings:
        $s1 = "webbrowserpassview" ascii wide nocase
        $s2 = "hacktool.webbrowserpassview" ascii wide nocase
        $s3 = "riskware.passwordrevealer" ascii wide nocase
        $s4 = "win32/webbrowserpassview" ascii wide nocase
    condition:
        uint16(0) == 0x5a4d and any of them
}

title: SystemHelpDesk Detection - Webbrowserpassview (Trojan) Execution & Triage
id: 9a7bf27b-3a5b-5cdc-a4be-9903e25ad142
status: production
description: Detects execution, defense evasion, and persistence behaviors associated
  with the Webbrowserpassview malware family. Detects suspicious execution from temporary
  user directories with hidden window flags and background transfer utilities.
references:
- https://malware-families-catalog.systemhelpdesk.com/families/webbrowserpassview
- https://malware-families-catalog.systemhelpdesk.com/defensive/downloader-dropper-protection
- https://malware-families-catalog.systemhelpdesk.com/
author: Ricky Jordan, Lead Threat Intelligence Analyst, SystemHelpDesk MSP
date: '2026-10-14'
modified: '2026-10-14'
tags:
- attack.trojan
- author.ricky-jordan
- source.systemhelpdesk-mfc
- attack.t1555_003
- attack.t1059
- attack.t1003
logsource:
  category: process_creation
  product: windows
detection:
  selection_process:
    Image|endswith:
    - \cmd.exe
    - \powershell.exe
    - \cscript.exe
    - \wscript.exe
    CommandLine|contains:
    - AppData\Local\Temp
    - -WindowStyle Hidden
    - /e:jscript
    - bitsadmin /transfer
  condition: selection_process
falsepositives:
- Legitimate enterprise administrative scripts during approved change windows
- Authorized IT software deployment utilities and backup management agents
level: medium

rule MALWARE_WIN_WEBBROWSERPASSVIEW_T3_ATTRIBUTION {
    meta:
        description = "Tier 3 Attribution Fingerprint: Heuristic detection for Webbrowserpassview tradecraft"
        tier = "T3 - Attribution Fingerprint"
        confidence = "High (Confirmed Family Signature)"
        author = "SystemHelpdesk Threat Research Desk"
        date = "2026-10-14"
    strings:
        // Core family identifier & heuristic payload signatures
        $attrib_str = "webbrowserpassview" ascii wide nocase
        $pe_magic = "MZ" ascii
        $net_marker = "http" ascii nocase
    condition:
        uint16(0) == 0x5a4d and ($attrib_str and $net_marker) and filesize < 15MB
}

Containment & Response Steps

Ordered checklist for responders. Adapt to your environment and engage professional support for active incidents.

1. Sever network connectivity for the flagged endpoint to terminate persistent command-and-control (C2) communication channels and stop Webbrowserpassview from retrieving secondary stage payloads.
2. Capture process memory triage to detect and terminate malicious threads injected by Webbrowserpassview into legitimate system processes such as explorer.exe or svchost.exe.
3. Audit Windows Registry Run keys (HKCU\Software\Microsoft\Windows\CurrentVersion\Run) and Task Scheduler entries to locate and purge Webbrowserpassview persistence hooks.
4. Deploy updated enterprise EDR detection signatures and conduct an out-of-band endpoint scan to isolate dropped binaries and staged payloads.
5. Rotate all credentials, domain user passwords, and session cookies active on the system during the Webbrowserpassview execution timeframe.

What to Avoid

Common mistakes during response to this family that can destroy evidence, spread the infection, or worsen recovery.

1. Do not assume the incident is resolved simply because an antivirus tool removed the initial Webbrowserpassview dropper; always verify that secondary payloads and persistence hooks have been eradicated.
2. Avoid logging in with Domain Admin or privileged credentials on a machine suspected of running Webbrowserpassview until memory triage is complete.
3. Do not delay host isolation; automated lateral movement and credential dumping can occur within minutes of initial execution.

References & External Analysis

• Search "webbrowserpassview" on VirusTotal (External Analysis)
• Search "webbrowserpassview" on Any.Run (Sandbox Sandbox)
• Search "webbrowserpassview" on MalwareBazaar (Malware Samples)

Frequently Asked Questions

Related Threats (Category: Trojan)

Explore other documented threats in the same operational category:

• Kwampirs
• Kranet
• Dynamer
• Netshadow
• Sysn
• Frethog
• Acid_Drop
• Fakeinstaller

Machine-readable

Get this profile as JSON: https://malware-families-catalog.systemhelpdesk.com/api/webbrowserpassview.json

Ecosystem & Interactive Environments

This profile is part of the Malware Families Catalog, a public dataset of 2,899 malware families. The catalog is also published across our ecosystem: Hugging Face, Kaggle, Zenodo, Replit, StackBlitz, CodeSandbox, and CodePen.